Spark-arrester.



' I. M. VAN HORN & L. E. ENDSLEY.

SPARK ARRESTER.

APPLICATION. FILED SEPT. 9, 1909.

Patented Dec. 19, 1911.

UNITED STATET UFFICE.

THOMAS M. VAN HORN, OF CHICAGO. ILLINDIS, AND LOUIS E. ENDSLEY, 01 LA FAYETTE,

INDIANA, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO AMERICAN SPARK ARRESTER COMPANY, OF INDIALIAPOLIS, INDIANA, A CORPORATION OF INDIANA.

srARx-ARREs'rE'R.

Specification of 7- tters Patent.

Patented Dec. 19. 1911.

Application filed September I), 1909. Serial No. 516,852.

To all whom it may concern:

Be it known that we, THOMAS M. VAN

Hoax and LOUIS E. Exnsnnx, of Chicago and La Fayette, respectively, counties of Cook and Tippecanoe, respectively, and States of Illinois and Indiana, respectively, have in vented a certain new and useful Spark- Arrester; and we do hereby declare that the following is a full, clear, and exact dcscription thereof, reference being bad to the accompanying drawings, in which like letters refer to like parts.

The object of this invention is to provide means in connection with a furnace for preventing the exit of cinder-s and sparks without hindering the draft. It is designed es-' pecially for use in connection with locomotives.

The chief feature of the invention consists in providing a centrifugal separator arranged to givethe exhaust gases one or more vertically disposed revolutions before the same reach the smoke stack. This means is preferably arranged between the smoke stack and the outlet ends of the boiler tubes. Between the means for giving the exhaust gases one or more revolutions and the smoke stack a baffle plate or partition is located that extends from the periphery of the smoke box some distance toward the center, so that the Cinders and sparks will not pass through it, and immediately to the rear of such baffle plate and in the bottom of the smoke box a funnel-shaped receptacle for the cinders and sparks is located. The riual exhaust jet is located under the smoke stack so as to discharge toward the same, wand thus maintain the draft.

Thus the smoke is given a whirling movement of one or more revolutions, during which movement tlfe sparks and cinders are separated by gravity and centrifugal force before the smoke passes to the SII'U'd-L'G stack, which causesthe smoke to issue from the smoke stack without any cinders or sparks and without the" use of a screen or other-obstruction through the path of the smoke.

The nature of the invention will be understood from the following description and claims and the accompanying drawings:

In the drawings Figure 1 is a central vertical section through a portion of a locomoin cross section and Fig. 2. Between plate tive equipped with said spark arrester. Fig. 2 is a central horizontal section through the forward portion of Fig. 1. Fig. 3 is a verti cal section on the line 3-3 of Fig. 1.

In the drawings 10 represents a portion of a locomotive boiler and 1.1 is the boiler tubes or flues through which the smoke passes.

' 12 is the front tube sheet.

13 is the usual smoke box at the front end of the locomotive. In the particular form herein shown this has been extended somewhat longer than usual, but such extension is not necessary.

14 is the smoke stack and 16 the exhaust steam nozzle that discharges upwardly toward the smoke stack.

The foregoing portions of the device shown in the drawings are old and may be made in any desired way. The centrifugal or whirling movement of the exhaust gases in the smoke box is caused by the following mechanism, which is somewhat in the nature of a horizontally disposed centrifugal separator or dust arrester. A deflecting plate 20 is secured along its upper edge to the forward surface of the boilertube sheet 12. The plate 20 extends entirely across the smoke chamber and tube sheet 12, and is inclined downwardly and forwardly from the tube sheet 12, so as to turn the smoke issuing from the upper boiler tubes in a. downwardly inclined direction.

Somewhat forward of the tube sheet a plate 21 is secured obliquely of the smoke box in a horizontal direction, as seen in Fig. 2, and vertically from the bottom of said box to a point slightly above the center of such box; see Figs. 1 and The upper edge of the plate 21 is on the same level as thelower edge of the plate 20. At the center of the smoke box there is a substantially semicylindrical casing 23. This casing is curved concentrical with the center of the smoke box, but the two sides of it extend up to a level with the top of the plate 21 and the rear end of said casing 23 is vertical and is connected with the forward edge of plate 20. The forward end of the casing 23 is secured to plate 21, seev 20 and the plate 21 there is a horizontal plate 22 that covers casing 23. It is on'a level with the top of the plate 21 and extends inwardly to casing 23 and is secured to plates 20 and 21 and casing 22 so the smoke cannot pass vertically on that side of, casing 23 .but must sweep.

transversely under said casing. There is also'a vertical plate 24 extending from the other side of casing 23 to the wall of the smoke box and downwardly from the lower end-of plate to a line on the same level as the bottom of casing 23, see Fig. 3, so the smoke from behind plate 24:- will pass under it-and then'upwardly. Between plates 24: and 21 and casing 23 and the wall of the smoke box there is ample space through which all gases pass upwardly and finally receive their complete gyrat-ory impetus.

The construction just described causes the' smoke to be deflected downwardly by the plate 20 into the space below it, and the plates 21, 22, and 23 cause it to pursue a centrifugal andspirally disposed course up through the spaces between plates 20, 24, 21, and'23, so that altogether the smoke makes atleast one revolution. The hea'viest'mat ter, such as cinders and sparks, will be deposited during such revolution, of the gases by the action of'gravity and by centrifugal force. Centrifugal force will throw the particles outwardly toward the shell of the smoke box, and gravity will cause them to be deposited in the hopper. f

A baflie plate 30 is placed transversely of the smoke box with an opening inth'e central portion thereof. Surrounding that opening there is-a horizontalcollar 32 extending toward the means for giving the gases---.revoluble movement and through which the smoke passes to the smoke stack. A receptacle 31 for 'theminders and sparks is located immediately to the rear of the baffle plate 30 and under said collar 32, and in--the bottom of the smoke box in position to catch said heavier matter as the same settlesdown. from' the-column of smoke or is deflected by the baflie plate. Said receptacle .31 is conical, with its lower outlet end contracted and closed or opened, as preferred.

The heavier particles which have not set-' tled by gravity before the smoke reaches the plate 30 are usually checked in their movement by said plate and collar so that theydo not ,pass through the opening tothe smoke stack but fall back in the receptacle 31.

We do not wish to be limited to the particular construction of the -means herein purpose. The longer the smoke box the shown for giving the gyratory movement of the smoke, as any means capable of giving said movement will suflice to accomplish the more opportunity will be given to separation of the particles, but we do not wish ourv invention to be limited to any particular length thereof, as we contemplate equipping a provided with a smoke box, a smoke stack leading therefrom, and an exhaust steam jet discharging upwardly toward said smoke stack, of means arranged in the smoke box for causing the exhaust gases to make one or more vertically disposed revolutions in the smoke box before reaching the smoke stack,

and a receiver in the lower part of the smoke box between said centrifugal means and the exhaust jet'for receiving the heavier particles. I '1 2. The combination with a steam boiler provided with a smoke box, a smoke stack leading therefrom, and an exhaust steam jet discharging upwardly toward said smoke stack, of means capable of giving the exhaust gases one or more revolutions in the smoke box before the same reach the smoke the smoke box between said centrifugal means and the smoke stack, and a receiver in the lower part of the smoke box and immediately in the rear of said bafiie plate for receiving the heavier particles.

stack, a battle plate arranged transversely of i 3. The combination with a steam boiler provided with a smoke box, a smoke stack leading therefrom, an exhaust steam jet discharging upwardly toward the smoke stack,

of means capable of giving the exhaust gases one or more. revolutions inthe smoke box before the same reach-the-smoke stack, a

baffle plate arranged transversely of the smoke box between said centrifugal means and the smoke stack, a horizontal collar surrounding, the opening of vsaid battle plate and extending toward said means for giving the gases revoluble movement, and a receiver 1n the lower part of the smoke box and below said collar for receiving the heav-' ier particles.

4. The combination with a steam boiler provided with .a tube sheet through which the smoke issues, a smoke box in front of the smoke box, and an exhaust'steam jetdischarging upwardly toward the smoke stack,

of a deflector plate secured to thetube sheet and projecting downwardly and forwardly therefrom, a vertically disposed plate vse-Ij cured to the wall-of the smoke box and extending obliquely thereof and projecting,

-;said tube shee't,.a smoke stack leading from-- above the center of the smoke box, and fixed our signatures in the presence of the means between said plates and secured witnesses herein named.

thereto to cause the exhaust gases to pursue THOMAS M. VAN HORN. a spirally disposed centrifugal course and LOUIS E. ENDSLEY. enable the same to make one or more revo- Witnesses: lutions before reaching the smoke stack. 0. M. MCLAUGIILIN,

In Witness whereof, We have hereunto af- V. H. Loonwoon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. A 

